Two Stage Regulators Diaphragm
RDDC Series
Introduction Two Stage Regulators Diaphragm
RDDC Series Two Stage Regulators Diaphragm feature a two-stage pressure reduction design. The combination of a metal diaphragm and a free poppet ensures excellent sensitivity and stable outlet pressure. This configuration makes these regulators ideal for low to medium flow applications that require steady outlet pressure.
Features Two Stage Regulators
◎ Lift poppet is made of Alloy C-276, offering excellent corrosion resistance
◎ Metal-to-metal seal between valve body and diaphragm provides ensured sealing performance
◎ Two-stage pressure reduction design ensures precise and stable outlet pressure
◎ The bonnet includes a captured vent port, allowing media to be vented to a designated location in the event of accidental diaphragm rupture
| DESCRIPTION | SPECIFICATION |
|---|---|
|
Port Size |
1/4″, 3/8″, 6 mm or 8 mm |
|
Max. Working Pressure |
4500 psig (310) bar |
|
|
0 ~ 25 psig (0 ~ 1.7 bar) |
|
Outlet Pressure Range |
0 ~ 50 psig (0 ~ 3.4 bar) |
|
|
0 ~ 100 psig (0 ~ 6.9 bar) |
|
|
0 ~ 150 psig (0 ~ 10.3 bar) |
|
|
0 ~ 250 psig (0 ~ 17.2 bar) |
|
Flow Coefficient (Cv) |
0.06 |
|
Working Temperature |
PCTFE：-40 ~ 165°F (-40 ~ 74°C)
Polyimide：14 ~ 194°F (-10 ~ 90°C) |
|
SPE (Supply Pressure Effect) |
0.01 psig per 100 psig source pressure change |
Flow Data
Process Specification Two Stage Regulators
| Process Specification | Special Cleaning and Packaging Process (FC-02) | Ultra High Purity Process (FC-03) |
|---|---|---|
|
Material |
316L SS, 316L SS VAR, Brass (Nickle-Plated), Alloy C-276 |
316L SS, 316L VAR |
|
Wetted Surface Roughness |
Face Seal Connection or Butt Weld Connection: Ra 20 μin. (0.5μ m) Threaded Connection or Tube Fitting Connection: Ra 32 μin. (0.8 μm) |
Face Seal Connection or Butt Weld Connection:
Ra 10 μin. (0.25 μm) |
|
Polishing Process |
Machine Finished |
Electropolished |
|
Assembly
Environment |
In specially cleaned areas |
ISO Class 4 (FS 209E Class 10 equivalent) cleanroom |
|
Packaging |
Double bagged |
Double bagged in cleanroom |
Note: For products with higher surface finish, please contact FITOK.
Major Materials of Construction
| Item | Component | Material/Specification |
|---|---|---|
|
1 |
Body |
316L SS, 316L VAR Brass (Nickle-Plated) or Alloy C-276
|
|
2 |
Poppet Damper |
PTFE/ASTM D1710
|
|
3 |
Friction Sleeve |
316L SS, 316L VAR
SS
or Alloy C-276 |
|
4 |
Poppet Spring |
Alloy X-750 |
|
5 |
Lift Poppet |
Alloy 276 |
|
6 |
Seat |
PCTFE/ASTM D1430 or
Polyimide |
|
7 |
Seat Retainer
|
316L SS, 316L VAR
SS
or Alloy C-276 |
|
8 |
Diaphragm
|
316L SS/ASTM A240 |
|
9 |
Bonnet
|
304 SS/ASTM A479 Brass
or
(Nickle-Plated) |
|
10 |
Panel Nut |
304 SS/ASTM A479 |
|
11 |
Handle |
ABS |
Porting Configurations
Notes:
1. IN and OUT are the inlet and outlet ports for connecting the valve to the system. so that other Port should not be used for system connections.
2. Porting configuration is viewed from the top.
